What does SSPC-SP10 involve in terms of surface preparation?

SSPC-SP10, also known as "Near-White Metal Blast Cleaning," involves power tool cleaning to the point where no more than 5% of the surface area can retain rust stains or contaminants. This standard is one of the higher levels of surface preparation outlined by the Society for Protective Coatings and is critical for achieving optimal adhesion and performance of protective coatings.

In this level of cleaning, the surface should be thoroughly cleaned to remove all mill scale, rust, dirt, oil, and other contaminants that could interfere with the coating's performance. It entails the use of power tools like grinders or sanders to ensure the surface achieves a near-white appearance, allowing for a suitable foundation for the application of coatings. This thorough preparation is necessary when high-performance coatings are applied, especially in environments that require robust corrosion protection.

This standard emphasizes the importance of achieving a clean, rough surface to enhance adhesion and longevity of the protective layer being applied. Understanding and implementing SSPC-SP10 is essential for coatings inspectors to ensure that surface preparations meet the necessary standards for effective coating performance.